The present work provides to treat real oily saline wastewater released from drilling oil sites by the use of electrocoagulation technique. Aluminum tubes were utilized as electrodes in a concentric manner to minimize the concentrations of 113400 mg TDS/L, 65623 mg TSS/L, and the ions of 477 mg HCO 3 /L, 102000 mg Cl/L and 5600 mg Ca/L presented in real oily wastewater under the effect of the operational parameters (the applied current and reaction time) by making use of the central composite rotatable design. The final concentrations of TDS, TSS, HCO 3 , Cl, and Ca that obtained were 93555 ppm (17.50%), 11011 ppm (83.22%), 189ppm (60.38%), 80000ppm (22%), and 4200 ppm (25%), respectively, under the optimum values of the operational parameters (1.625 Amps and 40 min). In spite of the low removal percentages of some pollutants, the present study proved the ability of this novel designed reactor for treating high saline real oily wastewater in accordance with the operational parameters. This prove the capability of the use of it as a pre-treatment of other conventional methods.

No abstract

No abstract

With the massive propagation of the mobile phone traffic and demand for high data rate transmission has grown this day, the current cellular spectrum for bands less than 3 GHz is severely deficient and cannot convoy these requirements, which requires the search for suitable solutions for the application of the fifth generation 5G. The potential of millimetre-wave (mm-wave) to provide a high data rate (Gigabits per second) has attracted great interest to become a broadband candidate for the fifth generation of cellular communications networks. To increase the spectral efficiency of cellular networks, Massive multi-input multi output (MMIMO) is considered one of the most promising methods, by equipping the base station with antenna arrays with hundreds or thousands of active elements with the use of beamforming technology and conducting coherent processing on both sides of the transmitter and receiver. In this paper, two mm-wave frequencies(28GHz and 73GHz) have been compared in terms of spectrum efficiency using a massive MIMO using two beamforming methods: conjugate beamforming (CB) and zero-forcing (ZF).

No abstract